Machine for milling or corrugating sheet metal



2 Sheets-Sheet 1.

(No Model.)

W. WESTLAKB. MAGEINE EOE MILLING 0E GOEEUGATING SHEET METAL.

eb. I2, 1895.

.- WITNESSES:I

ATTRNEY (No Model.) 2 Shets-Sheet '2.

W. WESTLAKE. MACHINE FOR MILLING 0B. GOERUGATING SHEET METAL.

No. 533,977. Patented I'eb.'12,1895.

WITN ESSES UNITED vSTATESA` PATENT OFFICE.`

WILLIAM wEsTLAKE, on BROOKLYN, NEW YORK.

MAcl-HNE FOR MlLLlNG OR'OORRUGATmG SHEET METAL.

SPECIFICATION forming part of Letters Patent-No. 533,977, dated February12, 1895.

Y Application led September 8,1394. Serial No. 522,419. (No model.)

To ZwwI/n, it may concern:

13e it lknown that I, WILLIAM WESTLAKE, a cltizenof the United States,residing at Brooklyn, Kings county, New York, have invented certain newand useful Improvements in Ma-l chines for Milling or Corrugating SheetMetal, of which the following is a specification.

This invention relates to the class of maohines which employ millingwheels or knurls for forming corrugations in sheet metal, and the objectof the invention is to provide a simple machine adapted for milling Orcorrugatlng the turned-up .marginal iiange on a sheet of metal to beemployed for a stoveboard, or for other purposes. The invention will befully described here- Inafter and its novel features carefully definedin the olaims. Y

In the accompanying drawings which illustrate an embodiment of theinvention-Figure 1 is a side elevationof the machine. Figs. 2 and 3 arehorizontal sections, taken respectively, on the lines x2 and m3 inFig. 1. Fig. 4 is a plan view of the front end of the sheetsupportingtable, showing the milling .wheels In plan. Fig.5 is a fragmentary planview of the milling wheels, on a large scale, and Fig. 6 is a section ofIche same on line 006 in Fig. 5. Fig. 7 is a fragmentary view of a is anend view of the machine.

1 is the frameof the machine which may be constructed of metal orwood,or of both, in any form best suited to the purpose. In the uprightportion 1X of the frame is rotatively mounted a driving shaft 2 carryingtight and loose belt-pulleys 3 and a bevel-wheel 4. The shaft 2 maybedriven in anyl convenient manner from any source of power. Mounted inbrackets 5 and Gon the upright part kof the frame, is a shaft 7 on whichis fixed a bevel-gear wheel 8 which gears with the wheel 4 on thedriving shaft. On the lower end of shaft 7 is secured one wheel, 9, of apair of milling wheels, the other wheel, 9X, of the pair being securedon the lower end of ashaft 7X. This shaft 7K is mounted in twobearing-blocks 10 and 11. (See Figs. 2 and 3.) The upper block 10 ismounted pivotally in the upper bracket 5 on screws or pins 12, and isconnected to the block 11 by a bar 13. The block llis mounted in a slotin the lower bracket 6 and has some play therein to allow the millingwheel 9X to be moved into and out of gear f with the wheel 9. Normally,themilling wheels are held apart, or out of engagement by some means,andpreferably, bya spring. This may be a coil spring 14 arranged betweenthe block 11 and the frame. In order to press the milling wheel 9xforcibly into gear with 6o rthe wheel 9 when a sheet of metal isinterposed between t'he wheels, a screwl is employed, arranged as shownin' Figs. 1 and 3. This screw is driven through the upright part of theframe and bears on the block 1l. The 65 .shaft 7 drives the shaft 7Kthrough the medium of gear-wheels 7 a on the respective shafts.

On the frame 1 is mounted a sheet-supporting table 16 which will behinged, for convenience, to the frame at 16x. This table, as here 7oshown,'extends from the hinging point 16x forward to about the pointwhere the pitch circles of the respective milling wheels meet, as seenin'Fig. 4, and will be provided at its front'edge with a stop or gui'de17 for the 75 sheet of metal. Preferably, there will be two stops, oneat each side of the milling wheels.

, Means are employed for raising the front end of the table 16 and kanysuitable known means may be used for the purpose. The de- 8o vice hereinshown comprises (see Fig. 8) a bridle, 18, secured to lugs, 19, on thetable and connected at their upper ends to a cord or chain, 18x, whichpasses over pulleys, 19x, on

a beam above and is provided with a Weight 8 5 20. The table is drawndown by a treadle, 20x, and cord, 20a.

In operating the machine, the screw 15 is run back so as to permit thespring 14 to separate the milling wheels and the table is 9o drawn down.A flanged sheet or shell7 of metal X A(seen in Fig. 7) is placed on thetable with the flange y thereon against the guide or guides 17 andprojecting upward. The weight 20 is now permitted to draw up the 95table, the flange on the sheet .passing up between the milling wheels.The'screw 15 is now'driven in until the teeth on the milling wheelsclamp and indent the upright flange y when the milling wheels will feedthe sheet along and mill or corrugate the flange.

It will be understood that the milling wheels will have teeth of thesize and form to proof the form shown in Fig. 5.

When the upright marginal flange about the sheet shall have been milledthe machine on the sheet and the machine is set in motion, Ico

duce the milling required and not necessarily io 5 will be stopped, themilling wheels opened, the table drawn down and the sheet removed.

This machineis designed for milling flanged sheets in general, butparticularly for milling rectangular sheets with rounded corners withthe stops 17 placed as represented in Fig. 4.. If circular sheets are tobe milled. the table 16 will be provided with an adjustable andremovable pin, 17a, mounted on the table and adapted to pass through acentral hole in the sheet. Such a pin is shown in Fig. 1.

The milling wheels may be wide enough on Vtheir faces to take in andmill the entire width of the flange on the sheet or only a part of thewidth thereof. Fig. 7 shows a shell for a stove-board; that is, a sheetwith a box flange turned on its edge, the free portion yx, of which isturned inward nearly at a right angle to the upright part. This viewshows the milling at Fig. showsa hanged plate in the grasp of the wheels9 and 9X, and being milled. I prefer to provide the wheel 0x with aflange, 9, to take under the sheet being operated on. This flange isbest seen in Fig. G.

As represented in the drawings, the shafts of the milling wheels arevertical and the table horizontal, and this arrangement is the preferredarrangement, but I do not Wish to limit myself in this respect.

The usual devices for stopping and starting the machine may be employed.As these devices will vary according to the mechanism employed. fordriving the shaft 2, I have not shown any for the purpose.

Having thus described my invention, I claim- 1. In a machine for millingthe tnrned-up llange on a sheet of metal, the combination with a pair ofmilling wheels, one of which is adapted to be moved into and out of gearwith the other` and mechanism for driving said wheels, of asheet-supporting table adapted to be moved toward and from the millingwheels for inserting and removing the flange to be milled, and means foroperating said table, substantially as set forth.

2. In a machine for milling the turned-up fiange on a sheet of metal,the combination with the frame, of a shaft 7 mounted rotatively inbrackets thereon, mechanism for driving said shaft, the shaft 7x mountedrotatively in blocks 10` and 11, the block 10 pivotally mounted in theupper bracket on the frame, the block 11 mounted and guided in the lowerbracket on the frame, the bar connecting said blocks, the milling wheelsand gears 7 on the respective shafts 7 and 7X, means for holding saidmilling wheels normally out of gear, means for putting said wheelsforcibly into gear, and a sheet-supporting table, adapted to be moved ina direction substantially at right angles to the plane of its face,substantially as set forth.

3. In a machine for milling the turned-up fiange on a sheet of metal,the combination with the frame, of a shaft 7 mounted rotatively inbrackets thereon, mechanism for driving said shaft, the shaft 7L mountedrotatively in blocks 10 and 11, the block 10 pivotally mounted in theupper bracket on the frame, the block 11 mounted and guided in the lowerbracket on the frame, the bar conneeting said blocks, the milling wheelsand gears 7 l on the respective shafts 7 and 7X, the spring 14, forseparating the milling Wheels, the screw 15 in the frame and bearing onthe block l1 for forcing themilling wheels into gear, and asheet-supporting table, adapted to be moved in a direction substantiallyat right angles to the plane of its face, substantially as set forth.

4. In amachine for milling the turned-np flange on a sheet of metal, thecombination with a pair of 'milling wheels, one of which is adapted 4tobe moved into and out of gear with the other, and mechanism for drivingsaid milling wheels,ot`the table 16 hinged at one end and provided atits other free end adjacent to the milling wheels, with astop or stops17 and means for elevating the free end of said table, substantially asset forth.

5. In a machine for milling the turned-up flange on a sheet of metal,the combination with a pair of upright shafts, milling wheels mounted onthe lower extremities of the said shafts, means for driving said shafts,and means for moving one of the milling Wheels into and out of gear withthe other, of a sheetsupporting table 1G, having its free, front edgearranged under the said milling wheels, and a stop 17 on the front edgeof said table, the stop co-inciding substantially, with the point wherethe pitch circles of the milling wheels come together, substantially asset forth.

6. In a machine for milling the turned up flange on a sheet of metal,the combination with a pair of milling wheels, one of which is providedwith a marginal flange to take under the sheet, and means for moving oneof said Wheels into and ont of gear with the other, of mechanism fordriving said Wheels, and a movable supporting table for the sheet,substantially as set forth.

7. In a machine for milling the turned up flange on a sheet of metal,the combination with a pair of milling Wheels, one of which is adaptedto move into and out of gear with the other, and mechanism for drivingsaid milling Wheels, of a sheet-supporting table adapted to be movedtoward and from the said wheels in a direction substantially at rightangles to the plane of its face, and a stop or stops on the saidtable-to properly guide the sheet during the milling operation,substantially as set forth.

In witness whereof I'havehercunto signed my name in the presence of twosubscribing witnesses.

WILLIAM W'ES'FLAKE.

Witnesses:

HENRY CONNETT. J. D. CAPLINGIR.

IOC

IIO

